<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>grid2</title>
</head>
<style>
    body {
        padding-top: 40px;
        background: #f5f7f8;
    }
    
    .grid-1 {
        display: grid;
        width: 100%;
        max-width: 600px;
        margin: 0 auto;
        grid-template-columns: 3fr 2fr 1fr;
        grid-template-rows: 100px 50px;
    }
    
    div {
        color: white;
        font-size: 20px;
        padding: 20px;
    }
    
    div:nth-child(1) {
        background: #b03532;
    }
    
    .item-2 {
        grid-column: 2 / span 2;
        grid-row: 1;
    }
    
    .item-3 {
        grid-column: 1 / span 2;
        grid-row: 2;
    }
    
    .item-4 {
        grid-area: 2 / 3 / span 2;
    }
    
    div:nth-child(2) {
        background: #33a8a5;
    }
    
    div:nth-child(3) {
        background: #30997a;
    }
    
    div:nth-child(4) {
        background: #6a478f;
    }
    
    div:nth-child(5) {
        background: #da6f2b;
    }
    
    div:nth-child(6) {
        background: #3d8bb1;
    }
</style>

<body>
    <section class="grid-1">
        <div class="item-1">1</div>
        <div class="item-2">2</div>
        <div class="item-3">3</div>
        <div class="item-4">4</div>
        <div class="item-5">5</div>
        <div class="item-6">6</div>
    </section>
</body>

</html>